 My Math Forum Algebra Check UP! WHY am I OFF by sqrt. 2
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 August 21st, 2013, 09:41 PM #1 Member   Joined: Aug 2013 Posts: 69 Thanks: 0 Algebra Check UP! WHY am I OFF by sqrt. 2 1/?((1-((x-1)/(x+1))^2 ) )*((1+x)-(1-x))/(1+x)^2 I end up getting = 2/?2x(1+x) ...the answer says it should 1/?x(1+x) ...Yes I did use the variable 2. And the answer was the same as the book... I've tried, but am blocked. Zen. August 22nd, 2013, 12:33 AM #2 Senior Member   Joined: Mar 2012 From: Belgium Posts: 654 Thanks: 11 Re: Algebra Check UP! WHY am I OFF by sqrt. 2 August 22nd, 2013, 10:34 PM #3 Newbie   Joined: May 2013 Posts: 16 Thanks: 0 Re: Algebra Check UP! WHY am I OFF by sqrt. 2 Solution: 1/(?(1-((x-1)�/(x+1)�))*((1+x)-(1-x))/(1+x)� =2x/((1+x)�?((x+1)�-(x-1)�/(x+1)�) =2x/((x+1)?((x+1)�-(x-1)�)) =2x/(x+1)?(4x) =x/(x+1)?x =?x/(x+1) this is the right answer. August 24th, 2013, 01:16 PM #4 Member   Joined: Aug 2013 Posts: 69 Thanks: 0 Re: Algebra Check UP! WHY am I OFF by sqrt. 2 Okay, I should go to sleep more , I have to brush up on my easy arithmetic, x^2 + 2x + 1 (not x^2 + x + 1) Thanks. August 24th, 2013, 01:20 PM #5 Member   Joined: Aug 2013 Posts: 59 Thanks: 0 Don't be lazy to learn the benefit of LaTeX. Thanks to gelatine1, we could move on to solve such problem. Tags algebra, check, sqrt Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post Artus Linear Algebra 0 October 13th, 2012 10:48 AM lorez Algebra 0 September 10th, 2009 09:24 AM nikkor180 Real Analysis 3 June 25th, 2009 03:18 AM Rocket Algebra 3 August 1st, 2008 05:36 AM andy Calculus 3 November 23rd, 2007 06:13 AM

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